GeoTIFF & COG

Insights about project management, GIS, and how technology is transforming industries operating in the physical world.

Free DEM and Elevation Data Sources, Verified in September 2026

Forty-eight URLs across sixteen elevation sources, probed on 11 September 2026: what each one answered, what resolution and vertical datum it really carries, which ones a browser app can read, and which famous links are now dead.

Read article

GeoTIFF & COG

What Is a Cloud Optimized GeoTIFF (COG)? How to Check One and How to Make One

A COG is not a new format — it is an ordinary GeoTIFF arranged so a client can read 16 KB of header instead of 300 MB of file. How to check one in the browser or with gdalinfo, how to build one with gdal_translate -of COG, and where to get open sample rasters that still work.

Read article

GeoTIFF & COG

Free DEM and Elevation Data Sources, Verified in September 2026

What Is a Cloud Optimized GeoTIFF (COG)? How to Check One and How to Make One

Navegação